William A. Jayne was a medical doctor and served as Abraham Lincoln's personal
physician in Springfield, Illinois. He also served as mayor of Springfield from 1859 to
1861. He became a member of the Illinois State Senate in 1860, and resigned in 1861 to
accept the appointment of governor of Dakota Territory from President Lincoln.

First Territorial capitol in present-day Yankton, South Dakota.

After resigning as territorial governor, Dr. Jayne returned to Illinois, serving as a
congressional representative for a year. He returned to his medical practice in
Springfield and served three more terms as mayor of that city.

Present-day Yankton, South Dakota, served as the first capitol of Dakota Territory. The
first governor's residence was a small log cabin.

Governor Jayne was from Illinois. He served as President Lincoln's personal physician.